diff --git a/cmd/sequencer/config/default.yml b/cmd/sequencer/config/default.yml
index cc46aec..ff0f3c0 100755
--- a/cmd/sequencer/config/default.yml
+++ b/cmd/sequencer/config/default.yml
@@ -77,7 +77,7 @@ PEBBLE_SEQUENCER__LarkAlert_Env: PROD
 PEBBLE_SEQUENCER__LarkAlert_Project: pebble-sequencer
 PEBBLE_SEQUENCER__LarkAlert_Secret: ""
 PEBBLE_SEQUENCER__LarkAlert_URL: ""
-PEBBLE_SEQUENCER__LarkAlert_Version: v0.2.2-1-gaccdfb7
+PEBBLE_SEQUENCER__LarkAlert_Version: ""
 PEBBLE_SEQUENCER__Logger_Level: DEBUG
 PEBBLE_SEQUENCER__MqttBroker_Cert_CA: ""
 PEBBLE_SEQUENCER__MqttBroker_Cert_Crt: ""
diff --git a/pkg/middlewares/blockchain/monitor.go b/pkg/middlewares/blockchain/monitor.go
index 1cb3d42..8014be3 100644
--- a/pkg/middlewares/blockchain/monitor.go
+++ b/pkg/middlewares/blockchain/monitor.go
@@ -137,6 +137,7 @@ func (m *Monitor) run(ctx context.Context) {
 		FromBlock: new(big.Int),
 		ToBlock:   new(big.Int),
 	}
+	step := uint64(1000)
 	for {
 		select {
 		case <-ctx.Done():
@@ -164,7 +165,7 @@ func (m *Monitor) run(ctx context.Context) {
 		if from >= current {
 			goto TryLater
 		}
-		to = min(current, from+100000)
+		to = min(current, from+step)
 		filter.FromBlock.SetUint64(from)
 		filter.ToBlock.SetUint64(to)
 		results, err = m.client.FilterLogs(ctx, filter)
diff --git a/pkg/middlewares/blockchain/subscription.go b/pkg/middlewares/blockchain/subscription.go
index 5fb1275..7e190dd 100644
--- a/pkg/middlewares/blockchain/subscription.go
+++ b/pkg/middlewares/blockchain/subscription.go
@@ -71,6 +71,7 @@ func (w *watcher) fields(others ...any) []any {
 }
 
 func (w *watcher) run(ctx context.Context) {
+	step := uint64(1000)
 	for {
 		select {
 		case <-ctx.Done():
@@ -97,7 +98,7 @@ func (w *watcher) run(ctx context.Context) {
 		if from >= current {
 			goto TryLater
 		}
-		to = min(current, from+100000)
+		to = min(current, from+step)
 		results, err = w.persist.QueryTxByHeightRange(w.meta, from, to)
 		if err != nil {
 			goto Failed